硝酸钙和IAA对温州蜜柑果实钙含量及其品质的影响   总被引：1，自引：0，他引：1  

肖家欣  彭抒昂  何华平  李江海 《果树学报》2005,22(3):211-215

在花期、花后1周、3周、采前2周对龟井蜜柑进行Ca(NO3)2、IAA和IAA+Ca(NO3)2喷布处理,同时测定了不同发育时期各处理果实钙含量及其采后果实的主要品质,并与采后浸钙处理和完熟采收果实品质进行了对比分析,结果表明:1)各处理的果皮钙含量在花后51d和112d均有所提高,但此期整个果实钙含量并无显著性差异,采收时各处理整个果实和果肉钙含量均显著高于对照;2)采收时各处理果实的可溶性固形物和可滴定酸均显著低于对照,可溶性糖、单果重、果皮色差值和相对电导率与对照无显著性差异,各处理糖酸比显著高于对照;3)采后30d时IAA+Ca(NO3)2喷布和采后浸钙处理果实的维生素C及完熟采收果实的可溶性固形物和可溶性糖均显著高于对照和其他处理。  相似文献   

椪柑萎缩型枯水病和粒化型枯水病几种生理指标差异的研究     

王向阳 《果树学报》2005,22(3):216-219

分析了椪柑萎缩型枯水与粒化型枯水以及正常果的生理差异。发现萎缩型枯水果的失重、呼吸速率显著高于粒化型枯水果,但其果肉水势和出汁率显著低于粒化型枯水果和正常果;萎缩型枯水与粒化型枯水一样,其脱落酸大量积累,14C-葡萄糖大量转化为不溶性物质。认为萎缩型枯水机理在于椪柑果实大量失水引发了逆境生理代谢,导致大量可溶性营养消耗,汁胞萎缩崩溃。  相似文献   

几种综合施肥措施对早熟温州蜜柑生长和产量的影响     

农奇仁  李生雷 《热带农业科学》2017,(4):18-21

对广西国有良丰农场十二年生早熟温州蜜柑采用几种施肥方法,比较不同施肥措施下,该地区早熟温州蜜柑各个物候期的生长发育情况和果实产量。结果表明:处理4分别在各个物候期前进行5次合理的氮、磷、钾配方施肥,明显影响果树的生长发育情况,果实成熟期相对提前;平均单果重量增加,达到125 g/个;平均单株产量明显增加,达到93.60 kg/株;平均产量最高,为73.94 t/hm~2。因此,针对该地区独特的地理气候环境,适合于该地区的合理施肥方式对于提高果树产量和增加经济收入显得尤为重要。  相似文献   

Alternaria Brown Spot of Minneola in Greece; Evaluation of Citrus Species Susceptibility     

K. Elena 《European journal of plant pathology / European Foundation for Plant Pathology》2006,115(2):259-262

During the last three years, a new disease was observed in northwestern Greece on Minneola trees, hybrid of mandarin and grapefruit. On May small brown necrotic leaf spots surrounded by yellow halo areas of various sizes appeared and covered a major portion of the leaves with extension of necrosis into the veins. On young fruits small, slightly depressed black spots were the first symptoms, which later became 2–7 mm in diameter. Brown spots were observed on the leaves and fruits in several orchards in the same area, causing leaves and fruits to drop. In some orchards over 50% of the fruits were affected. From the fruit and leaf spots the typical small-spore species Alternaria alternata was isolated. Pathogenicity tests were performed by artificially inoculating fruits of Minneola, common mandarin and Clementine. The symptoms of the disease were reproduced only on fruits of Minneola hybrids by the specific strain of the fungus Alternaria alternata pv. citri. Different citrus susceptibility tests indicated that mandarins Minneola, Nova and Page were very susceptible to tested isolates while Clementine SRA and Poros Clementine were not. All lemons and lime Seedless were not susceptible. Grapefruit New Hall was not susceptible, while the Star Ruby was. Orange Lane Late, Navel Late, Oval Poros, Olinda, Navel Athos were not susceptible and only Moro showed reaction being slightly susceptible only to one isolate.  相似文献   

砂糖橘上碎叶病毒外壳蛋白基因的克隆及序列分析     

孟祥春  向旭  钟云  刘岩  易干军 《果树学报》2007,24(6):796-798

利用RT-PCR技术对广东砂糖橘碎叶病毒的外壳蛋白(CTLV-CP)基因进行了克隆和测序分析。DNA序列分析表明,砂糖橘CTLV-CP基因的cDNA序列全长为786bp,编码262个氨基酸。BLAST分析结果显示,所得序列与苹果、梨茎沟病毒(ASGV)外壳蛋白基因及其它柑橘CTLV-CP基因的同源性在87%～91%,证明所克隆的片段为CTLV-CP基因。  相似文献   

Identification of AFLP fragments linked to seedlessness in Ponkan mandarin (Citrus reticulata Blanco) and conversion to SCAR markers     

Xiao JinPing  Chen LiGeng  Xie Ming  Liu HaiLin  Ye WeiQi 《Scientia Horticulturae》2009

Seedlessness is a desirable trait in citrus and has been an important breeding objective. In this study, we employed the amplified fragment length polymorphism (AFLP) technique to find molecular markers linked to the seedless trait in the Ponkan mandarin (Citrus reticulata Blanco). After screening with 72 primer pairs, 5 AFLP markers were identified that putatively correlated with the target trait. Their association was also tested by analyzing the AFLP profile from pooled individual accessions. The five fragments were cloned and sequenced, and BLAST searches showed that four of the markers had high homology to functional genes, providing some promising information that may aid in understanding the molecular mechanism of seedlessness in citrus. Based on the sequence information, eight specific primers were designed and eventually fragments AFLP-2 and AFLP-5 were successfully converted into sequence characterized amplified region (SCAR) markers. Thus, the markers detected could be useful for accelerating citrus breeding programmes by enabling early screening for seedlessness mutations using marker-assisted selection.  相似文献   

红壤温州蜜柑园连续施石灰的效应     

刘运武 《中国南方果树》1993,(1)

在湘南第四纪红色粘土母质发育的红壤温州蜜柑园连续6年施用石灰的试验结果表明,连年适量施用石灰可提高产量,与不施石灰处理相比增产13.2％～29.2％,品质亦得到改善。土壤和叶片测定结果显示,柑桔增产的原因,主要是施用石灰提高了土壤pH值,促进了土壤有机质的分解,增强了树体对土壤氮、磷元素的吸收。  相似文献   

温州蜜柑施氮效应的研究     

刘运武 《园艺学报》1992,19(4):326-332

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Postharvest rind breakdown of ‘Nules Clementine’ mandarin is influenced by ethylene application, storage temperature and storage duration   总被引：1，自引：0，他引：1  

Paul J.R. Cronje  Graham H. Barry  Marius Huysamer 《Postharvest Biology and Technology》2011,60(3):192-201

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提高柑桔品质的研究——Ⅱ.影响温州蜜柑品质的主要因子     

张秋明  萧浪涛  刘昆玉  谢深喜 《湖南农业大学学报(自然科学版)》1993,(3)

通过连续3年对湖南省温州蜜柑主要产区果实品质以及有关树体、土壤和气候条件等方面29个影响因子的调查和分析测定。采用通径分析方法,找出了影响温州蜜柑品质的5个主要因子是叶片氮、磷、钾含量,土壤交换钙含量和土壤pH 值.以此为依据,就上述因子对果实品质的影响进行进一步分析后发现,叶片含氮量与果实可溶性固形物,叶片含磷量与果实含酸量均呈显著负相关;叶片含钾量与单果重和果实含酸量,土壤交换钙与果实可溶性固形物均呈显著正相关;土壤pH 值与各单项品质指标间无显著相关性,可能以间接影响为主.同时,通过比较优质高产桔园和品质较差桔园的叶片养分含量,提出了叶片氮、磷、钾营养诊断的适量标准.  相似文献